CN103994870A - Detection apparatus and detection method for four-way valve - Google Patents
Detection apparatus and detection method for four-way valve Download PDFInfo
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- CN103994870A CN103994870A CN201310055169.2A CN201310055169A CN103994870A CN 103994870 A CN103994870 A CN 103994870A CN 201310055169 A CN201310055169 A CN 201310055169A CN 103994870 A CN103994870 A CN 103994870A
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Abstract
The invention provides a detection apparatus and detection method for a four-way valve. The detection apparatus comprises a booster pump, a to-be-detected four-way valve, and a reversing pilot valve. A valve cavity is arranged in the to-be-detected four-way valve; a piston is movably arranged in the valve cavity; piston heads are arranged at the two ends of the piston; the two ends of the valve cavity are respectively provided with a first pressure releasing port and a second pressure releasing port; a first interface of the to-be-detected four-way valve is communicated with the booster pump; and a second interface, a third interface, and a fourth interface of the to-be-detected four-way valve are enclosed. A first interface of the reversing pilot valve is communicated with the first interface of the to-be-detected four-way valve; a second interface of the reversing pilot valve is communicated with the first pressure releasing port of the to-be-detected four-way valve; a third interface of the reversing pilot valve is communicated with the second pressure releasing port of the to-be-detected four-way valve; and a fourth interface of the reversing pilot valve is communicated with the third interface of the to-be-detected four-way valve, thereby controlling reversing of the to-be-detected four-way valve. According to the invention, reversing is carried out while loading capacity detection is carried out, thereby testing the service life of the four-way valve.
Description
Technical field
The present invention relates to four-way valve detection field, especially, relate to a kind of four-way valve pick-up unit and detection method.
Background technology
At present, for four-way valve piston impact resistance, main hydraulic pressure detection (E, the C interface of sealing four-way valve that relies on water pressure engine, add 5.2MPa(R22, R407C from D, S interface to valve body), the hydraulic pressure of 6.5MPa (R410A), pressurize 3min, whether observe each position has leakage, abnormal deformation or destruction) verify.But in using because four-way valve is actual, not simple bear how much pressure and just can destroy, but in commutation process, there is impact failure, existing water pressure engine cannot be simulated actual service condition, four-way valve commutation life tests scheme in the market cannot verify that under much pressure, impacting how many times four-way valve just can damage, the checking Detection of content that punching is not turned over for four-way valve piston, piston screw thrusts.
Summary of the invention
The object of the invention is to provide a kind of four-way valve pick-up unit detection method, the be hit technical matters in the life-span while damage of the piston that cannot detect four-way valve to solve existing water pressure engine.
For achieving the above object, according to an aspect of the present invention, provide a kind of four-way valve pick-up unit, comprised force (forcing) pump; Four-way valve to be measured, in four-way valve to be measured, be provided with valve pocket, in valve pocket, be provided with movably piston, piston two ends are provided with piston crown, the two ends of valve pocket are respectively the first decompression port and the second decompression port, the first interface of four-way valve to be measured is connected with force (forcing) pump, the second interface of four-way valve to be measured, the 3rd interface and the sealing of the 4th interface; Change-over pilot valve, the first interface of change-over pilot valve is connected with the first interface of four-way valve to be measured, the second interface of change-over pilot valve is connected with the first decompression port of four-way valve to be measured, the 3rd interface of change-over pilot valve is connected with the second decompression port of four-way valve to be measured, the 4th interface of change-over pilot valve is connected with the 3rd interface of four-way valve to be measured, controls four-way valve commutation to be measured; The first decompression port place is provided with the first blowdown valve being connected with the first decompression port, and the second decompression port place is provided with the second blowdown valve being connected with the second decompression port.
Further, four-way valve pick-up unit also comprises controller, controls the action of change-over pilot valve, the first blowdown valve, the second blowdown valve and force (forcing) pump.
Further, four-way valve pick-up unit also comprises commutation solenoid, and controller is by the commutation of commutation solenoid controlled change-over pilot valve.
Further, the first interface place of four-way valve to be measured is provided with pressure transducer.
Further, four-way valve pick-up unit also comprises circulating fluid container, and the import of circulating fluid container is connected with the outlet of the first blowdown valve and the second blowdown valve, and the outlet of circulating fluid container is connected with the import of force (forcing) pump.
Further, between the first interface of four-way valve to be measured and force (forcing) pump, be provided with the 3rd blowdown valve.
Further, the 3rd blowdown valve is arranged on the port of the first interface of four-way valve to be measured.
According to a further aspect in the invention, also provide a kind of four-way valve detection method, used aforesaid four-way valve pick-up unit, comprised the steps:
Before four-way valve to be measured is connected to four-way valve pick-up unit, the second interface of four-way valve to be measured, the 3rd interface and the 4th interface are sealed; Four-way valve to be measured is connected with change-over pilot valve and force (forcing) pump; Set detected parameters, the first blowdown valve cuts out, and the second blowdown valve is opened; Open force (forcing) pump, start change-over pilot valve four-way valve pick-up unit and start to detect; When pressure reaches after the detected parameters of setting, keep a period of time, the first blowdown valve is opened, and the second blowdown valve cuts out, and completes one-shot and detects; Change-over pilot valve commutates, and continues to detect.
Further, detected parameters comprises dwell time, number of shocks, surge pressure and pressure release time.
Further, in the time that pressure transducer shows that pressure is constant or abnormal, four-way valve pick-up unit stops detecting automatically.
The present invention has following beneficial effect:
The present invention, by adding change-over pilot valve in test in pipeline, commutates to four-way valve in detecting four-way valve bearing capacity, to test the life-span of four-way valve in the situation that the piston of four-way valve is hit.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram before the commutation of four-way valve pick-up unit of the present invention; And
Fig. 2 is according to the schematic diagram after the commutation of four-way valve pick-up unit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1 and Fig. 2, according to four-way valve pick-up unit of the present invention, comprise force (forcing) pump 10; Four-way valve 30 to be measured, in four-way valve 30 to be measured, be provided with valve pocket, in valve pocket, be provided with movably piston 31, piston 31 two ends are provided with piston crown, the two ends of valve pocket are respectively the first decompression port 33 and the second decompression port 34, the first interface D of four-way valve 30 to be measured is connected with force (forcing) pump 10, the second interface E of four-way valve 30 to be measured, the 3rd interface S and the 4th interface C sealing; Change-over pilot valve 21, the first interface of change-over pilot valve 21 is connected with the first interface D of four-way valve 30 to be measured, the second interface of change-over pilot valve 21 is connected with the first decompression port 33 of four-way valve 30 to be measured, the 3rd interface of change-over pilot valve 21 is connected with the second decompression port 34 of four-way valve 30 to be measured, the 4th interface of change-over pilot valve 21 is connected with the 3rd interface S of four-way valve 30 to be measured, controls four-way valve 30 to be measured and commutates; The first decompression port 33 places are provided with the first blowdown valve 51, the second decompression port 34 places that are connected with the first decompression port 33 and are provided with the second blowdown valve 52 being connected with the second decompression port 34.
Use sealing cap by the second interface E of four-way valve 30 to be measured, the 3rd interface S and the 4th interface C are welded, and weld the process duct with A type copper nut at four-way valve 30, the second interface E to be measured and the 4th interface C, the process duct in first interface D welding with Type B nut.Pressurized air reaches by force (forcing) pump 10 hydraulic pressure needing four-way valve 30 to be measured is impacted, and realizes the commutation of four-way valve 30 to be measured, simulates the reversing impact in actual four-way valve use.Controller is programmed by PLC, use touch-screen input parameter, detected parameters surge pressure, number of shocks, dwell time and pressure release time etc. are adjusted, realize the impulse detection of different condition, be converted into digital signal by pressure transducer, the time relay etc., be presented on screen, obtain testing result.The present invention, by adding change-over pilot valve in test in pipeline, commutates to four-way valve in detecting four-way valve bearing capacity, to test the life-span of four-way valve in the situation that the piston of four-way valve is hit.
Four-way valve pick-up unit also comprises controller, controls the action of change-over pilot valve 21, the first blowdown valve 51, the second blowdown valve 52 and force (forcing) pump 10.Detected parameters can also be set on controller, such as dwell time, number of shocks, surge pressure and pressure release time etc.The first blowdown valve 51 and the second blowdown valve 52 are high-pressure solenoid valve, and four-way valve pick-up unit is realized pressurize, decompression function by the high-pressure solenoid valve at two ends, can manual control also can automatically control.
Referring to Fig. 1 and Fig. 2, four-way valve pick-up unit also comprises commutation solenoid 22, controller is controlled change-over pilot valve 21 and is commutated by the control solenoid 22 that commutates, commutation solenoid 22 is attracted the second commutation slide block 21a and is made its motion reach the object that change-over pilot valve 21 is commutated by power on/off, by the commutation of change-over pilot valve 21, pipeline being connected changes, and then driving the motion of the first commutation slide block 32 that four-way valve 30 to be measured is commutated, the two ends of the first commutation slide block 32 are connected with respectively two piston crowns.
Referring to Fig. 1 and Fig. 2, the first interface D place of four-way valve 30 to be measured is provided with pressure transducer 40.
Four-way valve pick-up unit also comprises circulating fluid container, and the import of circulating fluid container is connected with the outlet of the first blowdown valve 51 and the second blowdown valve 52, and the outlet of circulating fluid container is connected with the import of force (forcing) pump 10.In circulating fluid container, can adopt water or wet goods as medium, piston 31 to be impacted.
Referring to Fig. 1 and Fig. 2, between the first interface D of four-way valve 30 to be measured and force (forcing) pump 10, be provided with the 3rd blowdown valve 53.The 3rd blowdown valve 53 is arranged on the port of the first interface D of four-way valve 30 to be measured.
This four-way valve pick-up unit adopts liquid water or wet goods as medium, the piston 31 of four-way valve inside to be impacted, and pressurizes by force (forcing) pump 10, and in the time reaching setting detected pressures, four-way valve obtains electric commutation; Pressure is adjustable and can show adjustable extent 0.3～30Mpa; Detect and can show for several times; Dwell time and pressure release time can be set arbitrarily; Can show pressue-graph; When because four-way valve 30 to be measured damages, do not reach while detecting set pressure equipment auto stop; Can realize automatic and manual dual unloading pressure protection.
According to embodiments of the invention:
Referring to Fig. 1, after each setting parameter, virgin state four-way valve 30 to be measured is in refrigeration mode, and now the first blowdown valve 51 is in opening, and the second blowdown valve 52 cuts out; Starting outfit, force (forcing) pump 10 starts pressurization;
Referring to Fig. 2, when surge pressure reaches after set pressure, and keep after the dwell time of certain hour setting, controlling the commutation solenoid 22 of change-over pilot valve 21 switches on, the first blowdown valve 51 cuts out, the second blowdown valve 52 is opened, and four-way valve 30 to be measured commutates to heating mode, and piston 31 is carried out to reversing impact;
Referring to Fig. 1, when surge pressure reaches after set pressure, and keep after the dwell time of certain hour setting, control commutation solenoid 22 power-off of change-over pilot valve 21, the first blowdown valve 51 is opened, the second blowdown valve 52 cuts out, and four-way valve 30 to be measured commutates to refrigeration mode, and piston 31 is carried out to reversing impact;
The above step that circulates, until show that pressure is constant or abnormal, can judge that four-way valve 30 to be measured damages.
The present invention also provides a kind of four-way valve detection method, comprises the steps:
Before four-way valve 30 to be measured is connected to four-way valve pick-up unit, the second interface E of four-way valve 30 to be measured, the 3rd interface S and the 4th interface C are sealed;
Four-way valve 30 to be measured is connected with change-over pilot valve 21 and force (forcing) pump 10;
Set detected parameters, the first blowdown valve 51 cuts out, and the second blowdown valve 52 is opened;
Open force (forcing) pump 10, start change-over pilot valve 21 four-way valve pick-up units and start to detect;
When pressure reaches after the detected parameters of setting, keep a period of time, the first blowdown valve 51 is opened, and the second blowdown valve 52 cuts out, and completes one-shot and detects;
Change-over pilot valve 21 commutates, and continues to detect.
Detected parameters comprises dwell time, number of shocks, surge pressure and pressure release time.In the time that pressure transducer 40 shows that pressure is constant or abnormal, four-way valve pick-up unit stops detecting automatically.
Concrete detecting step according to four-way valve detection method of the present invention:
1, make and detect four-way valve 30 samples to be measured;
2, by the second interface E of four-way valve 30 to be measured, the 3rd interface S and the 4th interface C sealing, be then contained on four-way valve pick-up unit;
3, by assembling commutation solenoid 22 on change-over pilot valve 21, tighten screw, after having assembled, build detection case lid.
4, open power supply, the source of the gas of inspection four-way valve survey device, press device start button, wait for 30 seconds left and right opening of device, there is parameters value in device display screen curtain, clicks the compression shock module of four-way valve 30 to be measured and carry out detected parameters setting.
5, open after four-way valve compression shock module to be measured, can arrange detected parameters such as dwell time, pressure release times by manual click display screen; " startups ", " stopping " option that can be by clicking screen below after setting completes to detection start, shut-down operation.
6, the parameter such as impact time, pressure release time, number of run, surge pressure setting is set, and clicks start key and starts this detection.
Dwell time is set: this parameter is to set the retention time of exerting pressure, and controls by controlling the 3rd blowdown valve 53, after pressure arrives set pressure, automatically closes;
The pressure release time is set: this parameter is to set the required time that releases pressure, mainly controls the time of impact by controlling the first blowdown valve 51 and the second blowdown valve 52, and the first blowdown valve 51 and the second blowdown valve 52 are opened and carried out release;
Number of shocks is set: set the detection number of shocks detecting, by counter controls, in the time that number of times arrives set point number, automatically stop;
Surge pressure is set: this parameter is to set the surge pressure value detecting, and after regulating source of the gas reduction valve to regulate force (forcing) pump 10 pressure to be greater than set pressure, tests.
7, by the 3rd blowdown valve 53(source of the gas reduction valve) surge pressure (referring to force (forcing) pump 10 applied pressures, from the first interface D pipe applied pressure of four-way valve 30 to be measured) is transferred to detection desirable value.
8, will " current number of run: carry out zero clearing processing, record detects number of shocks again.
9, as there being any urgent abnormal or detection end shutdown in detecting, stop at once detecting, close source of the gas.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
The present invention, by adding change-over pilot valve in test in pipeline, commutates to four-way valve in detecting four-way valve bearing capacity, to test the life-span of four-way valve in the situation that the piston of four-way valve is hit.The present invention is directed to four-way valve and use actual conditions, by design and the control of pipeline, can realize four-way valve reversing impact, and can regulate the parameter such as surge pressure, dwell time; Checking four-way valve is in the commutation that reaches different surge pressures, dwell time; Can improve the material quality control that detects four-way valve different manufacturers; Valid data can be provided, improve and set up four-way valve examination criteria.Effectively control and reduce failure rate after sale for system four-way valve quality.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a four-way valve pick-up unit, is characterized in that, comprising:
Force (forcing) pump (10);
Four-way valve to be measured (30), in described four-way valve to be measured (30), be provided with valve pocket, in described valve pocket, be provided with movably piston (31), described piston (31) two ends are provided with piston crown, the two ends of described valve pocket are respectively the first decompression port (33) and the second decompression port (34), the first interface (D) of described four-way valve to be measured (30) is connected with described force (forcing) pump (10), the second interface (E), the 3rd interface (S) and the sealing of the 4th interface (C) of described four-way valve to be measured (30);
Change-over pilot valve (21), the first interface of described change-over pilot valve (21) is connected with the first interface (D) of described four-way valve to be measured (30), the second interface of described change-over pilot valve (21) is connected with described first decompression port (33) of described four-way valve to be measured (30), the 3rd interface of described change-over pilot valve (21) is connected with described second decompression port (34) of described four-way valve to be measured (30), the 4th interface of described change-over pilot valve (21) is connected with the 3rd interface (S) of described four-way valve to be measured (30), control described four-way valve to be measured (30) commutation,
Described the first decompression port (33) locates to be provided with the first blowdown valve (51) being connected with described the first decompression port (33), and described the second decompression port (34) locates to be provided with the second blowdown valve (52) being connected with described the second decompression port (34).
2. four-way valve pick-up unit according to claim 1, is characterized in that, also comprises controller, controls the action of described change-over pilot valve (21), described the first blowdown valve (51), described the second blowdown valve (52) and described force (forcing) pump (10).
3. four-way valve pick-up unit according to claim 2, is characterized in that, also comprises commutation solenoid (22), and described controller is controlled described change-over pilot valve (21) commutation by described commutation solenoid (22).
4. four-way valve pick-up unit according to claim 1, is characterized in that, the first interface (D) of described four-way valve to be measured (30) locates to be provided with pressure transducer (40).
5. four-way valve pick-up unit according to claim 1, it is characterized in that, also comprise circulating fluid container, the import of described circulating fluid container is connected with the outlet of described the first blowdown valve (51) and described the second blowdown valve (52), and the outlet of described circulating fluid container is connected with the import of described force (forcing) pump (10).
6. four-way valve pick-up unit according to claim 1, is characterized in that, is provided with the 3rd blowdown valve (53) between the first interface (D) of described four-way valve to be measured (30) and described force (forcing) pump (10).
7. four-way valve pick-up unit according to claim 6, is characterized in that, described the 3rd blowdown valve (53) is arranged on the port of the first interface (D) of described four-way valve to be measured (30).
8. a four-way valve detection method, is characterized in that, right to use requires the four-way valve pick-up unit described in any one in 1 to 7, comprises the steps:
Before four-way valve to be measured (30) is connected to four-way valve pick-up unit, second interface (E) of four-way valve to be measured (30), the 3rd interface (S) and the 4th interface (C) are sealed;
Described four-way valve to be measured (30) is connected with change-over pilot valve (21) and force (forcing) pump (10);
Set detected parameters, described the first blowdown valve (51) cuts out, and described the second blowdown valve (52) is opened;
Open described force (forcing) pump (10), start described change-over pilot valve (21) four-way valve pick-up unit and start to detect;
When pressure reaches after the described detected parameters of setting, keep a period of time, described the first blowdown valve (51) is opened, and described the second blowdown valve (52) cuts out, and completes one-shot and detects;
Described change-over pilot valve (21) commutates, and continues to detect.
9. four-way valve detection method according to claim 8, is characterized in that, described detected parameters comprises dwell time, number of shocks, surge pressure and pressure release time.
10. four-way valve detection method according to claim 8, is characterized in that, in the time that pressure transducer (40) shows that pressure is constant or abnormal, described four-way valve pick-up unit stops detecting automatically.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310055169.2A CN103994870B (en) | 2013-02-20 | 2013-02-20 | Four-way valve detection method |
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| CN201310055169.2A CN103994870B (en) | 2013-02-20 | 2013-02-20 | Four-way valve detection method |
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| CN103994870A true CN103994870A (en) | 2014-08-20 |
| CN103994870B CN103994870B (en) | 2017-06-30 |
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Cited By (7)
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| CN105334046A (en) * | 2015-12-14 | 2016-02-17 | 芜湖三花自控元器件有限公司 | High-pressure reversing device used for four-way valve and detection method |
| CN105403681A (en) * | 2015-12-16 | 2016-03-16 | 成都峰占科技有限公司 | Water quality on-line monitoring instrument remote monitoring and control device and water quality on-line monitoring system |
| CN105665298A (en) * | 2016-01-18 | 2016-06-15 | 上海比泽机电设备科技有限公司 | Full-automatic internal leakage test board for four-way valve |
| CN107402124A (en) * | 2017-07-20 | 2017-11-28 | 中广核工程有限公司 | A kind of nuclear power plant's Steam Turhine Adjustment valve group periodic test method and apparatus |
| CN109682594A (en) * | 2019-01-22 | 2019-04-26 | 格力电器（合肥）有限公司 | Four-way valve test macro |
| CN111076922A (en) * | 2019-12-17 | 2020-04-28 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
| CN112361683A (en) * | 2020-11-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Compressor starting protection device, control method and air-cooled water chilling unit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334046A (en) * | 2015-12-14 | 2016-02-17 | 芜湖三花自控元器件有限公司 | High-pressure reversing device used for four-way valve and detection method |
| CN105403681A (en) * | 2015-12-16 | 2016-03-16 | 成都峰占科技有限公司 | Water quality on-line monitoring instrument remote monitoring and control device and water quality on-line monitoring system |
| CN105665298A (en) * | 2016-01-18 | 2016-06-15 | 上海比泽机电设备科技有限公司 | Full-automatic internal leakage test board for four-way valve |
| CN107402124A (en) * | 2017-07-20 | 2017-11-28 | 中广核工程有限公司 | A kind of nuclear power plant's Steam Turhine Adjustment valve group periodic test method and apparatus |
| CN109682594A (en) * | 2019-01-22 | 2019-04-26 | 格力电器（合肥）有限公司 | Four-way valve test macro |
| CN111076922A (en) * | 2019-12-17 | 2020-04-28 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
| CN111076922B (en) * | 2019-12-17 | 2021-09-24 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
| CN112361683A (en) * | 2020-11-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Compressor starting protection device, control method and air-cooled water chilling unit |
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